“Female Force: Sheryl Sandberg” is a digital comic book available on iTunes, the Kindle store and other e-book sources, or as a print version at ComicFleaMarket.com. It tells the story of Facebook’s chief operating officer, who recently wrote the best-seller “Lean In.” It’s a fun read, and has candid lines like, “Just try negotiating when you’re pregnant.” The company also sells comic book life stories of Bill Gates, Melinda Gates, Mark Zuckerberg, Steve Jobs, Arianna Huffington and many others.